Python-gmp

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* Updated ``setup.py`` to work in more situations.
* Corrected exception handling in basic operations with `mpfr` type.
* Correct ``InvalidOperation`` exception not raised in certain circumstances.
* `invert()` now raises an exception if the modular inverse does not exist.
* Fixed internal exception in `is_bpsw_prp()` and `is_strong_bpsw_prp()`.
* Updated `is_extra_strong_lucas_prp()` to latest version.

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* The test suite is still incomplete.

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* The new test suite (``test/runtest.py``) is incomplete and some tests fail on
Python 2.x due to formatting issues.

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* `mp_version()`, `mpc_version()`, and `mpfr_version()` now return normal
strings on Python 2.x instead of Unicode strings. (casevh)
* Fix warnings when shifting 32-bit integer by 32 bits. (casevh)
* Faster conversion of the standard library `~fractions.Fraction` type
to `mpq`. (casevh)
* Improved conversion of the `~decimal.Decimal` type to `mpfr`. (casevh)
* Consistently return `OverflowError` when converting ``inf``. (casevh)
* Fix `mpz.__format__()` when the format code includes "". (casevh)
* Add `is_infinite()` and deprecate ``is_inf()``. (casevh)
* Add `is_finite()` and deprecate ``is_number()``. (casevh)
* Fixed the various ``is_XXX()`` tests when used with `mpc`. (casevh)
* Fixed error handling with mpc(); mpc(1,"nan") is properly handled. (casevh)
* Added caching for `mpc` objects. (casevh)
* Faster code path for basic operation is both operands are `mpfr`
or `mpc`. (casevh)
* Fix `mpfr` + `float` segmentation fault. (casevh)

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* Allow `xmpz` slice assignment to increase length of `xmpz` instance by
specifying a value for stop. (casevh)
* Fixed reference counting bug in several ``is_xxx_prp()`` tests. (casevh)
* Added `~xmpz.iter_bits()`, `~xmpz.iter_clear()`, `~xmpz.iter_set()` methods
to `xmpz`. (casevh)
* Added `powmod()` for easy access to three argument :func:`pow()`. (casevh)
* Removed ``addmul()`` and ``submul()`` which were added in 2.0.0b1 since they
are slower than just using Python code. (casevh)
* Bug fix in gcd_ext when both arguments are not `mpz`. (casevh)
* Added `ieee()` to create contexts for 32, 64, or 128 bit `float`'s. (casevh)
* Bug fix in `context()` not setting `~context.emax`/`~context.emin` correctly
if they had been changed earlier. (casevh)
* Contexts can be directly used in with statement without requiring
`set_context()`/`local_context()` sequence. (casevh)
* `local_context()` now accepts an optional context. (casevh)

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* Rename to gmpy2 to allow backwards incompatible changes (casevh)
* Renamed 'mpf' to 'mpfr' to reflect use of MPFR (casevh)
* Renamed functions that manipulate individual bits to ``bit_XXX()`` to align
with :meth:`~int.bit_length()`.
* Added caching for `mpq`. (casevh)
* Added ``rootrem()``, `fib2()`, `lucas()`, `lucas2()`. (casevh)
* Support changed hash function in Python 3.2. (casevh)
* Added `is_even()`, `is_odd()`. (casevh)
* Add caching of the calculated hash value. (casevh)
* Add `xmpz` (mutable `mpz`) type. (casevh)
* Fix `mpq` formatting issue. (casevh)
* Add read/write bit access using slices to `xmpz`. (casevh)
* Add read-only bit access using slices to `mpz`. (casevh)
* Add `pack()`/`unpack()` methods to split/join an integer into n-bit
chunks. (casevh)
* Add support for MPFR (casevh)
* Removed fcoform float conversion modifier. (casevh)
* Add support for MPC. (casevh)
* Added context manager. (casevh)
* Allow building with just GMP/MPIR if MPFR not available. (casevh)
* Allow building with GMP/MPIR and MPFR if MPC not available. (casevh)
* Removed most instance methods in favor of gmpy2.function. The general
guideline is that *properties* of an instance can be done via instance
methods but *functions* that return a new result are done using
gmpy2.function. (casevh)
* Added ``__ceil__()``, ``__floor__()``, and ``__trunc__()`` methods since they
are called by :func:`math.ceil()`, :func:`math.floor()`, and
:func:`math.trunc()`. (casevh)
* Removed ``gmpy2.pow()`` to avoid conflicts. (casevh)
* Removed ``gmpy2._copy()`` and added `xmpz.copy()`. (casevh)
* Added support for ``__format__()``. (casevh)
* Added ``as_integer_ratio()``, ``as_mantissa_exp()``,
``as_simple_fraction()``. (casevh)
* Updated rich_compare. (casevh)
* Require MPFR 3.1.0+ to get divby0 support. (casevh)
* Added `fsum()`, `degrees()`, `radians()`. (casevh)
* Updated random number generation support. (casevh)
* Changed license to LGPL 3+. (casevh)
* Added `lucasu()`, `lucasu_mod()`, `lucasv()`, and `lucasv_mod()`. (casevh)
*Based on code contributed by David Cleaver.*
* Added probable-prime tests. (casevh)
*Based on code contributed by David Cleaver.*
* Added `to_binary()`/`from_binary()`. (casevh)
* Renamed ``numdigits()`` to `~mpz.num_digits()`. (casevh)
* Added keyword precision to constants. (casevh)
* Added ``addmul()`` and ``submul()``. (casevh)
* Added ``__round__()``, `round2()`, `round_away()` for `mpfr`. (casevh)
* ``round()`` is no longer a module level function. (casevh)
* Renamed module functions ``min()/max()`` to ``min2()/max2()``. (casevh)
No longer conflicts with builtin :func:`min()` and :func:`max()`
* Removed ``set_debug()`` and related functionality. (casevh)
* Removed mpf.setprec(), use mpf.round() (casevh)
* Fix test compatibility with Python 3.1.2 and 3.2 (casevh)
* Remove old random number functions, to be replaced later (casevh)
* Remove tagoff option (casevh)
* Debug messages only available if compiled with -DDEBUG (casevh)
* Renamed context() -> local_context(), new_context() -> context() (casevh)
* Added get_context() (casevh)